Rotary pump.



'JOHN' FRODSHAM, 0F FRODSHAM, CALIFORNIA.

ROTARY PUMP.'-

' To all whom t may concern:

- citizen of the United States, residing at Be it known that I, JOHN FRoDsHAM, a

Frodsham, in the county of Sacramento and State of California, 'have invented new and useful Improvements in Rotary Pumps, of.

which the following is a specification.

This invention relates `to rotary pumps -or motors;'and has for its object to simplify and improve the construction and operation of such devices.

One form whichmyinvention may assume .isexemplified in the following description and illustrated in the accompanying'drawings, in which- Figure 1 shows a side\elevation of a device Vembodying' my invention, with the cover plate of the casin removed. Fig. 2 shows a vertica ,'cent'al, sectional view of the same.

Fig. 3 shows a transverse sectional view.

Fig. 4`shows a detached view ofthe interior of the cover plate.

Fig. 5 shows a detail view, in section, of the rotor. j f

Fig. 6 shows a detached view of one of the vanes. r

Fig. 7 shows a detached view of a removable lock oristop employed therein.v

Fig. 8 shows a detached view, in perspective, of the removable curved plates employed inthe casing to give the same the required 'shape or outline.

'Fig. 9 shows a side elevation of the rotor detached.

Referring more shown, it comprises a cylindrical casing. 10

J with a removable head 11 and a rotor 12 within the casing carried on-a shaft'13, journaled in bearings --14 on the heads of the cylinder concentric thereof, said rotor being in the shape of a drum provided with side' flanges lpifejecting radially and contact` ing with tlinner circumference of the ca'sing at all points. The rotor carries radial vanes 16, slidable endwisein slots 17 and held in'place by lugs or projections 18 on mil the sides near the'inner end thereof, the said slots havin enlargements 17a at their inner ends to a it said lugs, whereby the vane may be inserted atthe sides ofthe rotor and whereby the vanes will be held in spaced relation to theend walls of the casing'as well as "the circumscribing walls. The casing is provided with ports 19 and/20 at points thereon separated by about 90. v

Speciiication of Letters Patent.

Application filed May 31, 1917. Serial No. 171,904.

in detail to the device Patented Mar. .4, 1 919.

The present embodiment is shown in the 'form of. a pump andl communicatingwith said ports are L-shaped, screw-threaded spigots 21 and 22, respectively, forming intake and outletconnections.

The portion of the casin adjacent to the ports is fitted with detacha lecurved plates 23,' spaced apart and so shaped and p osi tionedV as to give the interior of the casing an elliptical outline. A block 24 detachably secured to the casing between the ports spaces the plates apart' and forms an anchor and support therefor. The plates lie between the {ianges I5 of the rotor and in conjunction with the block 24 contact with the periphery of the body portion of the rotor, thereby closing the space between the rotor and thefcasing. It will be further observed that when the platesv 23 and their block 24 are'held in position by a screw 24', the rotor Y will be held against lateral movement Vand will require no further anchorage.' The ends -of the plates 23 being spaced apart form openings 25 which register with the ports 19 and 20. The heads of the casing, ad-

jacent to the center, carry each a c'am 26,

against which the inner ends of thevanes abut, said cams being so`4 shaped' and positioned as to keepithe vanes projected into operative relation with the, inner walls of the elliptical chamber and determine their movement, it not being intended to rely upon the guiding action of the outer wall for movement as a waterseal exists between adjacent edges of the vanes and the case. These cams are in a plane with the flanges 15 of throtor, the core or central portion lof the rotor b eing countersunk for this purpose. In operation, the rotor "may be driven in 'either direction and when Foperated as a pump gthe' branch of the L not lin use is closed by a Ascrew plug 27. Water is drawn `in through fone of the ports 19-20 and passes through the openings 25, between vthev plates 23, and is carried aroundby the vanes to the oppositeport. 'The annular, space be? tween the periphery of the drum and the inner wall of thecasing is of uniform cross section from one port to the other so that the resistance offered to the passage of water therethrough is not varied. The spaced plates V23 and block 24 close the water clan nel with an abruptness, as shown at 28,'by

reason of which weeds and debris,- will not;

be wedgedbetween therotor and cs isilng.v

The described arrangement is simple. and

economical to manufacture, since the casingk is cylindrical in form and the rotor is centrally journaled within. The curved plates 23 are detachable and can be replaced without much expense, whengworn. The vanes' are adequately supported by the flanges 15 and are kept in place by the lugs 18. Due to the fact that the ends of the vanes extend I through slots 17, it is' desirable that they be held against lateralmovement in relation to the rotor as is ei'ected by these lugs. These lugs also abut against the inner periphery of the rotor in the outermost position of the vanes and are held thereagainst by the cams 26. In this manner the vanes will ,be rigidly held against the lever action of the y water pressure against the ends of the vanes v operative relation with the inner 25 `from the spirlt of my invention as disclosed and thus aid in the action of the guide slots 17. The cam 26 acts to control the position ofthe vanes vso that rthey will beheld in walls of the casing at all times. i

Various changes in the construction and arrangement of the parts herein shown and p described'ma be made without .departing in the appended claims.

Having thus described my invention what I claimy and desire to secure by Detters Patent isn 1. Arotary' pump comprising a cylindrical casing, a rotor journaled' therein and concentric therewith, circular end Hanges of enlarged diameter formed upon the rotor and.

in parallel spaced relation`to each other, said flanges andthe body of the rotor being formed with `radial slots extending the entire width of the rotor,separate vanes reciprocally mounted within said slots for radial movement, and positively operating means for reciprocating said vanes throughout the movement of the rotor.

l2. A rotary pump or motor, comprising a cylindrical casing, a cylindrical rotor therein having end ianges concentric with the casing and a `cylindrical body portion of reduced diameter and concentric with said end flanges, radial slots being formed through the cylindrical wallof the rotor and entirely .through the end flanges, separate vanes independently mounted within the radial slots, means formed upon said vanes for limiting their-outward movement, and means formed upon the end walls of the casing, whereby the outward movement of said vanes will be predetermined to cause their outer ends to describe an elliptical path of travel.v

3. In a rotary pump having a cylindrical casing, a cylindrical rotor thereln within vwhich are formed radial slots, a vane consisting of a body portion having fiat parallel sides and formed along one edge With anarcuatel face, and perpendicularlyextendin lugs formed upon the opposite flat faces o the vane and at the corners lformed by the ends and the inner edge thereof, whereby the outward movement of the vane will be limited when positioned within the rotor.

4. In a rotary pump, a cylindrical casing,

a tubular cylindrical rotor positioned therein ing lugs at the opposite ends of said vanes adapted to pass through the v'l"slots in the rotor flanges and to seat within the recesses v of said flanges, whereby the vanes may be inserted from either side of the Yrotor and when moving radially will be locked against lateral movement.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN FRODSHAM.

Witnesses:

JOHN H. HERBING, W. W. HEALEY. 

